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<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>25_函数的参数用法</title>
  </head>
  <body>
    <script>
      function test(a, b, c, ...args) {
        // console.log(a);
        // let a = arguments; //a的数组类型
        // console.log(Array.from(a));
        //call/apply 改变this指向的方向

        // console.log(Array.prototype.slice.call(a));
        // console.log(Array.prototype.slice.apply(a));
        console.log([...args]);
      }
      test(1, 2, 3, 4, 5, 6, 7, 8, 9);
    </script>
  </body>
</html>
